CN104723576A - Forming device and forming method of continuous fiber reinforced thermoplastic resin preimpregnation sheet material - Google Patents
Forming device and forming method of continuous fiber reinforced thermoplastic resin preimpregnation sheet material Download PDFInfo
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Abstract
本发明公开了一种连续纤维增强热塑性树脂预浸片材的成型设备与方法。本发明的成型设备包括纱架，纤维预分散装置，单螺杆挤出机，螺旋式熔融浸渍模具，二次辊压装置，冷却牵引机和收卷机；螺旋式熔融浸渍模具内布置有1-3根螺旋浸渍辊，螺旋浸渍辊的外表面开始有螺旋沟槽，并通过电机驱动在螺旋式熔融浸渍模具内旋转。当螺旋浸渍辊转动时，树脂沿螺槽槽内流道，实现纤维纵向方向浸渍，同时由于挤压作用，熔体沿垂直纤维方向流动，实现横向浸渍。使用本发明的成型设备制备的连纤维增强热塑性树脂预浸片材，浸渍效果好，浸渍效率高，生产稳定性好，从而获得性能优异的产品。
The invention discloses a molding device and method for a continuous fiber reinforced thermoplastic resin prepreg sheet. The molding equipment of the present invention comprises creel, fiber predispersing device, single-screw extruder, spiral type melting impregnation mould, secondary rolling device, cooling tractor and winding machine; 3 spiral impregnation rolls, the outer surface of the spiral impregnation rolls begins to have spiral grooves, and is driven by a motor to rotate in a spiral melt impregnation mold. When the spiral impregnating roller rotates, the resin flows along the inner channel of the screw groove to impregnate the fiber in the longitudinal direction, and at the same time, due to the extrusion, the melt flows along the direction perpendicular to the fiber to realize the transverse impregnation. The fiber-reinforced thermoplastic resin prepreg sheet prepared by using the molding equipment of the invention has good impregnation effect, high impregnation efficiency and good production stability, thereby obtaining a product with excellent performance.
Description
技术领域 technical field
本发明涉及连续纤维增强热塑性树脂复合材料，具体地说，是一种连续纤维增强热塑性树脂预浸片材的成型设备与方法。 The invention relates to continuous fiber-reinforced thermoplastic resin composite materials, in particular to a molding device and method for continuous fiber-reinforced thermoplastic resin prepreg sheets.
背景技术 Background technique
连续纤维增强热塑性树脂是一种增强纤维单向排布且其长度与制品等长的增强型热塑性树脂，树脂均匀地分布在纤维之间，形成连续相，以固定纤维的空间位置，并在材料内部传递载荷。它与普通的短纤维增强热塑性树脂相比，具有更加突出的机械性能、耐热性能、抗翘曲性能、尺寸稳定性等，因而可制造出机械性能卓越的产品，如汽车零部件、电子器件、化工部件等。 Continuous fiber-reinforced thermoplastic resin is a reinforced thermoplastic resin whose reinforcing fibers are arranged in one direction and whose length is equal to that of the product. Internal transfer load. Compared with ordinary short fiber reinforced thermoplastic resins, it has more outstanding mechanical properties, heat resistance, warpage resistance, dimensional stability, etc., so it can manufacture products with excellent mechanical properties, such as auto parts, electronic devices , chemical components, etc.
已经有一些公开的制备连续纤维增强热塑性树脂的浸渍设备与浸渍方法，这些成型方法的共同特点是浸渍设备比较单一，一般只有一个浸渍单元组成，浸渍设备的结构主要为张力辊，纤维通过交替绕过张力辊，形成一定的包角，实现纤维的浸渍。但这些设备的缺点是：（1）纤维交替高低绕过张力辊形成的包覆角太小，由于纤维浸渍主要靠包覆张力辊形成压力实现浸渍的，包覆角越小，纤维浸渍效果越差；（2）为增大包覆角，必然要增加张力辊数目，张力辊数目增加导致浸渍模具过长，模具越长，集料越多，熔体阻力越大，影响拉挤的稳定性；（3）浸渍模具内的张力辊是静止的，纤维被动绕过张力辊，导致阻力大，影响纤维的浸渍效果和挤出的稳定性，尤其难以实现纤维束横向方向的浸渍。 There have been some disclosed impregnation equipment and impregnation methods for preparing continuous fiber reinforced thermoplastic resins. The common feature of these molding methods is that the impregnation equipment is relatively simple, generally consisting of only one impregnation unit. The structure of the impregnation equipment is mainly tension rollers. The tension roller forms a certain wrap angle to realize the impregnation of fibers. But the disadvantages of these equipment are: (1) The wrapping angle formed by the fibers alternately bypassing the tension roller is too small. Since the fiber impregnation is mainly achieved by the pressure formed by the wrapping tension roller, the smaller the wrapping angle, the better the fiber impregnation effect. Poor; (2) In order to increase the cladding angle, it is necessary to increase the number of tension rollers. The increase in the number of tension rollers will cause the impregnation mold to be too long. The longer the mold, the more aggregates and the greater the melt resistance, which will affect the stability of pultrusion (3) The tension roller in the impregnation mold is stationary, and the fibers passively bypass the tension roller, resulting in high resistance, which affects the impregnation effect of fibers and the stability of extrusion, and it is especially difficult to achieve impregnation in the transverse direction of fiber bundles.
发明内容 Contents of the invention
本发明的目的在于克服现有连续纤维增强热塑性树脂制备方法中存在的技术缺陷，提供一种纤维分散浸渍质量好、生产稳定性高的连续纤维增强热塑性树脂预浸片材的成型设备与方法。 The purpose of the present invention is to overcome the technical defects existing in the existing continuous fiber reinforced thermoplastic resin preparation method, and provide a continuous fiber reinforced thermoplastic resin prepreg molding equipment and method with good fiber dispersion and impregnation quality and high production stability.
为了实现上述目的，本发明采取了如下技术方案： In order to achieve the above object, the present invention has taken the following technical solutions:
一种连续纤维增强热塑性树脂预浸片材的成型设备与方法，该成型设备沿挤拉方向依次包括：纱架1，纤维预分散装置2，单螺杆挤出机3，螺旋式熔融浸渍模具4，二次辊压装置5，冷却牵引机6和收卷机7；螺旋式熔融浸渍模具4与单螺杆挤出机3呈直角式连接，纤维预分散装置2布置在纱架和螺旋式熔融浸渍模具4之间，后面依次为冷却牵引机6和收卷机7；螺旋式熔融浸渍模具4内布置有1-3根螺旋浸渍辊8，螺旋浸渍辊8的外表面开始有螺旋沟槽，并通过电机驱动在螺旋式熔融浸渍模具4内旋转。 A continuous fiber-reinforced thermoplastic resin prepreg sheet molding equipment and method, the molding equipment sequentially includes along the extrusion direction: creel 1, fiber pre-dispersion device 2, single-screw extruder 3, spiral melt impregnation mold 4 , a secondary rolling device 5, a cooling tractor 6 and a winder 7; the spiral melt impregnation die 4 is connected at right angles to the single screw extruder 3, and the fiber pre-dispersion device 2 is arranged on the creel and the spiral melt impregnation Between the molds 4, followed by a cooling tractor 6 and a winder 7; 1-3 spiral impregnation rollers 8 are arranged in the spiral melt impregnation mold 4, and the outer surface of the spiral impregnation roller 8 begins to have spiral grooves, and It is driven by a motor to rotate in the spiral melting impregnation mold 4 .
其中，螺旋浸渍辊8直径为60-100mm，间距为120-200mm，螺旋沟槽的槽深为3mm，槽宽为8mm，螺距为60-90mm，螺旋沟槽的头数为1-10。 Among them, the diameter of the spiral dipping roller 8 is 60-100mm, the pitch is 120-200mm, the groove depth of the spiral groove is 3mm, the groove width is 8mm, the pitch is 60-90mm, and the number of heads of the spiral groove is 1-10.
其中，二次辊压装置5由四根压辊组成，压辊直径为400mm，四根压辊呈L型排布。 Wherein, the secondary rolling device 5 is composed of four pressing rollers, the diameter of which is 400 mm, and the four pressing rollers are arranged in an L shape.
其中，所用的热塑性树脂为聚丙烯，尼龙，聚氨酯中的一种或几种，连续纤维为玻璃纤维或碳纤维。 Wherein, the thermoplastic resin used is one or more of polypropylene, nylon and polyurethane, and the continuous fiber is glass fiber or carbon fiber.
本发明还提供了上述连续纤维增强热塑性树脂预浸片材的制备方法，包括以下步骤： The present invention also provides a method for preparing the above-mentioned continuous fiber reinforced thermoplastic resin prepreg sheet, comprising the following steps:
（1）首先，连续纤维束9从纱架1引出后交替绕过纤维预分散装置2的分散辊，在分散辊的张力作用下得到初步分散； (1) First, after the continuous fiber bundle 9 is drawn out from the creel 1, it alternately bypasses the dispersing rollers of the fiber pre-dispersing device 2, and is initially dispersed under the tension of the dispersing rollers;
（2）连续纤维束9经预分散后进入螺旋式熔融浸渍模具4，并沿螺旋式熔融浸渍模具4内螺旋浸渍辊8表面的螺旋沟槽排布，同时，热塑性树脂经单螺杆挤出机3熔融后进入螺旋式熔融浸渍模具4，连续纤维束9在冷却牵引机6的牵引下，沿螺旋浸渍辊8表面的螺旋沟槽拉挤；当螺旋浸渍辊8转动时，树脂熔体沿螺旋沟槽流动，实现纤维纵向方向浸渍，同时由于挤压作用，树脂熔体沿垂直纤维的方向流动，实现纤维横向浸渍； (2) The continuous fiber bundle 9 enters the spiral melt impregnation mold 4 after being pre-dispersed, and is arranged along the spiral groove on the surface of the spiral impregnation roller 8 inside the spiral melt impregnation mold 4. At the same time, the thermoplastic resin passes through the single screw extruder 3 melts and enters the spiral melt impregnation mold 4, and the continuous fiber bundle 9 is pulled by the cooling tractor 6 along the spiral groove on the surface of the spiral impregnation roller 8; when the spiral impregnation roller 8 rotates, the resin melt along the spiral The groove flow realizes impregnation in the longitudinal direction of the fiber, and at the same time, due to extrusion, the resin melt flows in the direction perpendicular to the fiber to realize the transverse impregnation of the fiber;
（3）连续纤维从螺旋式熔融浸渍模具4拉出后进入二次辊压装置5，并交替绕过二次辊压装置5的压辊，在压力作用下，将热塑性树脂积压在纤维束内部，使纤维和热塑性树脂达到致密结合，提高纤维的浸渍效果； (3) The continuous fiber is pulled out from the spiral melt impregnation mold 4 and enters the secondary rolling device 5, and alternately bypasses the pressure rollers of the secondary rolling device 5, and under pressure, the thermoplastic resin is accumulated in the fiber bundle , so that the fiber and thermoplastic resin can achieve a dense combination and improve the impregnation effect of the fiber;
（4）经二次辊压装置4辊压后的连续纤增强热塑性树脂经冷却牵引机6充分冷却，然后通过收卷机7收卷，即可制备连续纤维增强热塑性树脂预浸片材。 (4) The continuous fiber-reinforced thermoplastic resin rolled by the secondary rolling device 4 is fully cooled by the cooling tractor 6, and then wound up by the winder 7 to prepare a continuous fiber-reinforced thermoplastic resin prepreg sheet.
与现有技术相比较，本发明具有以下优点： Compared with the prior art, the present invention has the following advantages:
（1）螺旋式熔融浸渍模具是通过螺旋浸渍辊实行纤维分散和浸渍的，螺旋浸渍辊表面开设有多头螺旋沟槽，纤维绕螺旋沟槽排布和走向，包覆角通过螺旋沟槽的螺旋角和螺距控制，一根螺旋浸渍辊可实现较大包覆角，从而在较短距离内即可实现纤维的充分浸渍，大大缩短模具长度； (1) The spiral impregnation mold is used to disperse and impregnate the fibers through the spiral impregnation roller. The surface of the spiral impregnation roller is provided with multi-head spiral grooves, and the fibers are arranged and directed around the spiral grooves. Angle and pitch control, a helical dipping roller can achieve a larger wrapping angle, so that the fibers can be fully impregnated in a short distance, greatly shortening the length of the mold;
（2）由于螺旋式熔融浸渍模具较短，模具内聚集的熔体较少，熔体阻力小，纤维不容易断丝，可大幅提高拉挤的稳定性； (2) Due to the short spiral melt impregnation mold, there is less melt accumulated in the mold, the melt resistance is small, the fiber is not easy to break, and the stability of pultrusion can be greatly improved;
（3）螺旋浸渍辊通过电机驱动可在螺旋式熔融浸渍模具内旋转，当螺旋浸渍辊转动时，树脂沿螺旋沟槽流动，实现纤维纵向方向浸渍，同时由于挤压作用，熔体沿垂直纤维方向流动，实现横向浸渍，通过纵向和横向浸渍，可大幅提高纤维的浸渍效果。 (3) The spiral impregnation roller is driven by a motor and can rotate in the spiral melt impregnation mold. When the spiral impregnation roller rotates, the resin flows along the spiral groove to impregnate the fibers in the longitudinal direction. At the same time, due to extrusion, the melt flows along the vertical fiber Flow in one direction to achieve transverse impregnation, and through longitudinal and transverse impregnation, the impregnation effect of fibers can be greatly improved.
附图说明 Description of drawings
图1是本发明连续纤维增强热塑性树脂预浸片材成型设备的俯视图； Fig. 1 is the top view of continuous fiber reinforced thermoplastic resin prepreg sheet molding equipment of the present invention;
图2是本发明螺旋浸渍辊的结构示意图； Fig. 2 is the structural representation of spiral dipping roll of the present invention;
图3是本发明二次辊压装置压辊布局示意图。 Fig. 3 is a schematic diagram of the layout of the pressing rollers of the secondary rolling device of the present invention.
其中：1-纱架；2-纤维预分散装置；3-单螺杆挤出机；4-螺旋式熔融浸渍模具；5-二次辊压装置；6-冷却牵引机；7-收卷机；8-螺旋浸渍辊；9-连续纤维束。 Among them: 1- creel; 2- fiber pre-dispersion device; 3- single-screw extruder; 4- spiral melt impregnation mold; 5- secondary rolling device; 6- cooling tractor; 7- winding machine; 8-spiral dipping roll; 9-continuous fiber bundle.
具体实施方式 Detailed ways
下面结合具体实施例对本发明进行详细说明。 The present invention will be described in detail below in conjunction with specific embodiments.
实施例1 Example 1
根据本发明的连续纤维增强热塑性树脂预浸片材的成型设备，沿挤拉方向依次包括：纱架1，纤维预分散装置2，单螺杆挤出机3，螺旋式熔融浸渍模具4，二次辊压装置5，冷却牵引机6和收卷机7；螺旋式熔融浸渍模具4与单螺杆挤出机3呈直角式连接，纤维预分散装置2布置在纱架和螺旋式熔融浸渍模具4之间，后面依次为冷却牵引机6和收卷机7；螺旋式熔融浸渍模具4内布置有1根螺旋浸渍辊8，螺旋浸渍辊8的外表面开始有螺旋沟槽，并通过电机驱动在螺旋式熔融浸渍模具4内旋转。 According to the molding equipment of continuous fiber reinforced thermoplastic resin prepreg sheet of the present invention, along the extrusion direction, it comprises: creel 1, fiber pre-dispersion device 2, single screw extruder 3, spiral melt impregnation mold 4, secondary Rolling device 5, cooling tractor 6 and winder 7; spiral melt impregnation die 4 is connected at right angles to single screw extruder 3, fiber pre-dispersion device 2 is arranged between creel and spiral melt impregnation die 4 Between, followed by cooling tractor 6 and winding machine 7 in sequence; a spiral impregnation roller 8 is arranged in the spiral melt impregnation mold 4, and the outer surface of the spiral impregnation roller 8 begins to have spiral grooves, and is driven by a motor on the spiral Rotate inside the type melt impregnation mold 4.
螺旋浸渍辊8直径为60mm，间距为120mm，螺旋沟槽槽深为3mm，槽宽为8mm，螺距为60mm，螺旋沟槽的头数为3；二次辊压装置5由四根压辊组成，压辊直径为400mm，四根压辊呈L型排布。 Spiral impregnation roller 8 has a diameter of 60mm, a pitch of 120mm, a spiral groove depth of 3mm, a groove width of 8mm, a pitch of 60mm, and the number of heads of the spiral groove is 3; the secondary rolling device 5 is composed of four pressing rollers , the diameter of the pressure roller is 400mm, and the four pressure rollers are arranged in an L shape.
所用的热塑性树脂为尼龙，连续纤维为碳纤维。 The thermoplastic resin used is nylon and the continuous fiber is carbon fiber.
制备方法如下： The preparation method is as follows:
（1）首先，连续纤维束9从纱架1引出后交替绕过纤维预分散装置2的分散辊，在分散辊的张力作用下得到初步分散； (1) First, after the continuous fiber bundle 9 is drawn out from the creel 1, it alternately bypasses the dispersing rollers of the fiber pre-dispersing device 2, and is initially dispersed under the tension of the dispersing rollers;
（2）连续纤维束9经预分散后进入螺旋式熔融浸渍模具4，并沿螺旋式熔融浸渍模具4内螺旋浸渍辊8表面的螺旋沟槽排布，同时，热塑性树脂经单螺杆挤出机3熔融后进入螺旋式熔融浸渍模具4，连续纤维束9在冷却牵引机6的牵引下，沿螺旋浸渍辊8表面的螺旋沟槽拉挤；当螺旋浸渍辊8转动时，树脂熔体沿螺旋沟槽流动，实现纤维纵向方向浸渍，同时由于挤压作用，树脂熔体沿垂直纤维的方向流动，实现纤维横向浸渍； (2) The continuous fiber bundle 9 enters the spiral melt impregnation mold 4 after being pre-dispersed, and is arranged along the spiral groove on the surface of the spiral impregnation roller 8 inside the spiral melt impregnation mold 4. At the same time, the thermoplastic resin passes through the single screw extruder 3 melts and enters the spiral melt impregnation mold 4, and the continuous fiber bundle 9 is pulled by the cooling tractor 6 along the spiral groove on the surface of the spiral impregnation roller 8; when the spiral impregnation roller 8 rotates, the resin melt along the spiral The groove flow realizes impregnation in the longitudinal direction of the fiber, and at the same time, due to extrusion, the resin melt flows in the direction perpendicular to the fiber to realize the transverse impregnation of the fiber;
（3）连续纤维从螺旋式熔融浸渍模具4拉出后进入二次辊压装置5，并交替绕过二次辊压装置5的压辊，在压力作用下，将热塑性树脂积压在纤维束内部，使纤维和热塑性树脂达到致密结合，提高纤维的浸渍效果； (3) The continuous fiber is pulled out from the spiral melt impregnation mold 4 and enters the secondary rolling device 5, and alternately bypasses the pressure rollers of the secondary rolling device 5, and under pressure, the thermoplastic resin is accumulated in the fiber bundle , so that the fiber and thermoplastic resin can achieve a dense combination and improve the impregnation effect of the fiber;
（4）经二次辊压装置5辊压后的连续纤增强热塑性树脂经冷却牵引机6充分冷却，然后通过收卷机7收卷，即可制备连续纤维增强热塑性树脂预浸片材。 (4) The continuous fiber-reinforced thermoplastic resin rolled by the secondary rolling device 5 is fully cooled by the cooling tractor 6, and then wound up by the winder 7 to prepare a continuous fiber-reinforced thermoplastic resin prepreg sheet.
本实例制备出的连续纤维增强热塑性树脂预浸片材，厚度为0.32mm，拉伸强度650MPa，弯曲破坏强度为550MPa，弯曲模量30GPa。 The continuous fiber-reinforced thermoplastic resin prepreg sheet prepared in this example has a thickness of 0.32 mm, a tensile strength of 650 MPa, a flexural breaking strength of 550 MPa, and a flexural modulus of 30 GPa.
实施例2 Example 2
根据本发明的连续纤维增强热塑性树脂预浸片材的成型设备，沿挤拉方向依次包括：纱架1，纤维预分散装置2，单螺杆挤出机3，螺旋式熔融浸渍模具4，二次辊压装置5，冷却牵引机6和收卷机7；螺旋式熔融浸渍模具4与单螺杆挤出机3呈直角式连接，纤维预分散装置2布置在纱架和螺旋式熔融浸渍模具4之间，后面依次为冷却牵引机6和收卷机7；螺旋式熔融浸渍模具4内布置有3根螺旋浸渍辊8，螺旋浸渍辊8的外表面开始有螺旋沟槽，并通过电机驱动在螺旋式熔融浸渍模具4内旋转。 According to the molding equipment of continuous fiber reinforced thermoplastic resin prepreg sheet of the present invention, along the extrusion direction, it comprises: creel 1, fiber pre-dispersion device 2, single screw extruder 3, spiral melt impregnation mold 4, secondary Rolling device 5, cooling tractor 6 and winder 7; spiral melt impregnation die 4 is connected at right angles to single screw extruder 3, fiber pre-dispersion device 2 is arranged between creel and spiral melt impregnation die 4 Between, followed by cooling tractor 6 and winder 7 in turn; three spiral impregnation rollers 8 are arranged in the spiral melt impregnation mold 4, and the outer surface of the spiral impregnation roller 8 begins to have spiral grooves, and is driven by a motor on the spiral Rotate inside the type melt impregnation mold 4.
螺旋浸渍辊8直径为100mm，间距为200mm，螺旋沟槽的槽深为3mm，槽宽为8mm，螺距为100mm，螺旋沟槽的头数为10；二次辊压装置5由四根压辊组成，压辊直径为400mm，四根压辊呈L型排布。 Spiral dipping roller 8 has a diameter of 100mm, a pitch of 200mm, a spiral groove depth of 3mm, a groove width of 8mm, a pitch of 100mm, and the number of heads of the spiral groove is 10; the secondary rolling device 5 consists of four pressing rollers Composition, the diameter of the pressure roller is 400mm, and the four pressure rollers are arranged in an L shape.
所用的热塑性树脂为聚丙烯，连续纤维为玻璃纤维。 The thermoplastic resin used is polypropylene and the continuous fiber is glass fiber.
制备方法如下： The preparation method is as follows:
（1）首先，连续纤维束9从纱架1引出后交替绕过纤维预分散装置2的分散辊，在分散辊的张力作用下得到初步分散； (1) First, after the continuous fiber bundle 9 is drawn out from the creel 1, it alternately bypasses the dispersing rollers of the fiber pre-dispersing device 2, and is initially dispersed under the tension of the dispersing rollers;
（2）连续纤维束9经预分散后进入螺旋式熔融浸渍模具4，并沿螺旋式熔融浸渍模具4内螺旋浸渍辊8表面的螺旋沟槽排布，同时，热塑性树脂经单螺杆挤出机3熔融后进入螺旋式熔融浸渍模具3，连续纤维束9在冷却牵引机6的牵引下，沿螺旋浸渍辊8表面的螺旋沟槽拉挤；当螺旋浸渍辊8转动时，树脂熔体沿螺旋沟槽流动，实现纤维纵向方向浸渍，同时由于挤压作用，树脂熔体沿垂直纤维的方向流动，实现纤维横向浸渍； (2) The continuous fiber bundle 9 enters the spiral melt impregnation mold 4 after being pre-dispersed, and is arranged along the spiral groove on the surface of the spiral impregnation roller 8 inside the spiral melt impregnation mold 4. At the same time, the thermoplastic resin passes through the single screw extruder 3 melts and enters the spiral melt impregnation mold 3, and the continuous fiber bundle 9 is pulled along the spiral groove on the surface of the spiral impregnation roller 8 under the traction of the cooling tractor 6; when the spiral impregnation roller 8 rotates, the resin melt along the spiral The groove flow realizes impregnation in the longitudinal direction of the fiber, and at the same time, due to extrusion, the resin melt flows in the direction perpendicular to the fiber to realize the transverse impregnation of the fiber;
（3）连续纤维从螺旋式熔融浸渍模具4拉出后进入二次辊压装置5，并交替绕过二次辊压装置5的压辊，在压力作用下，将热塑性树脂积压在纤维束内部，使纤维和热塑性树脂达到致密结合，提高纤维的浸渍效果； (3) The continuous fiber is pulled out from the spiral melt impregnation mold 4 and enters the secondary rolling device 5, and alternately bypasses the pressure rollers of the secondary rolling device 5, and under pressure, the thermoplastic resin is accumulated in the fiber bundle , so that the fiber and thermoplastic resin can achieve a dense combination and improve the impregnation effect of the fiber;
（4）经二次辊压装置5辊压后的连续纤增强热塑性树脂经冷却牵引机6充分冷却，然后通过收卷机7收卷，即可制备连续纤维增强热塑性树脂预浸片材。 (4) The continuous fiber-reinforced thermoplastic resin rolled by the secondary rolling device 5 is fully cooled by the cooling tractor 6, and then wound up by the winder 7 to prepare a continuous fiber-reinforced thermoplastic resin prepreg sheet.
本实例制备出的连续纤维增强热塑性树脂预浸片材，厚度为0.35mm，拉伸强度450MPa，弯曲破坏强度为300MPa，弯曲模量20GPa。 The continuous fiber-reinforced thermoplastic resin prepreg sheet prepared in this example has a thickness of 0.35 mm, a tensile strength of 450 MPa, a flexural breaking strength of 300 MPa, and a flexural modulus of 20 GPa.
本发明可用其他的不违背本发明的精神或主要特征的具体形式来概述。因此，无论从那一点来看，本发明的上述实施方案都只能认为是对本发明的说明而不能限制本发明，因此，与本发明的权利要求书相当的含有和范围内的任何改变，都应认为是包括在权利要求书的范围内。 The present invention may be embodied in other specific forms without departing from the spirit or main characteristics of the invention. Therefore, no matter from that point of view, the above-mentioned embodiments of the present invention can only be considered as illustrations of the present invention and cannot limit the present invention. It should be considered to be included in the scope of the claims.
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